· How to Compress: The cube is compressed by the middle zipper; Using steps: 1)Fold and flatten clothes 2)Pack clothes in the cube and zip the front zipper 3) Put a finger on the back of the middle zipper when compressing to avoid zipper get stuck in fabric· Premium Fabric: Smooth and soft fabric protects clothes from wrinkles and stains; High performance feature makes sure this packing cubes can bear high density wear and tear; Water resistant feature nicely protect clothes from spill or leak· Easy to Trip: Using the compression packing cubes not only can utilize the limited space in suitcase to accommodate more essentials but also can categorize and organize your items so that you can find what you want whenever you need it· Versatile and Multi Functional: Different sizes packing cubes for different packing purposes; Separating your clothes such as jackets, sweaters, underwears, socks into different packing cubes for easy access· Items Included: The 4 set includes one extra large, one large, one medium, one small. The 6 set includes extra large, one large, one medium, one small, one slim bag and one shoe bag